※ 필수입력정보 ※

▷ 제품버젼 : Nmail5 .NET 버전

▷ 오류발생 메뉴/주소 : 메일 송수신관련

▷ 에러메세지 :

-------- Forwarded Message --------
Subject: [Return Mail] 552-5.7.0 This message was blocked because its
content presents a potential
Date: Thu, 20 Feb 2020 15:45:55 +0900
From: sm-tech.kr PostMaster <****@****>
To: ****@****



552-5.7.0 security issue. Please visit
552-5.7.0  to review our
552 5.7.0 message content and attachment content guidelines.
a13si1755005pff.25 - gsmtpX-MailerServer: NMail5 Ver 5.0

[Send Fail Message]
552-5.7.0 This message was blocked because its content presents a potential
552-5.7.0 security issue. Please visit
552-5.7.0  to review our
552 5.7.0 message content and attachment content guidelines.
a13si1755005pff.25 - gsmtp


================ Original Message Header ================
>> ReTryCount:2
>> ReTryDate:***-****-****545
>> ReTryCount:1
>> ReTryDate:***-****-****528
>> ReTryCount:0
>> ReTryDate:***-****-****028
>> MAIL FROM:<****@****>
>> RCPT TO:<****@****>
>> CONNECTIP:<203.138.86.173>
>> IPCHECK:<TRUE>
>> Mail_Kind:2
>> x-nmail-delimiter: NMAIL_DELIMITER
>> received-SPF: PASS
>> Received: from mail.rhizome-net.co.jp (203.138.86.173)
>> by sm-tech.kr (192.168.0.180) with [NMail5 Ver 5.0]
>> for <****@****> from <****@****>;
>> Thu, 20 Feb 2020 15:40:28 +0900
>> X-Nmail5-RBL: NONE
>> Received: by rhizome-net.co.jp (Postfix, from userid 0)
>> id 407A617456AD; Thu, 20 Feb 2020 15:40:20 +0900 (JST)
>> Received: from [192.168.202.175] (unknown [118.21.146.98]) (Authenticated
>> sender: ****@****)
>> by rhizome-net.co.jp (Postfix) with ESMTPA id 0A5DD1741DA1;
>> Thu, 20 Feb 2020 15:40:14 +0900 (JST)
>> To: SM TECH =?UTF-8?b?5bCP5riF5rC06YOo6ZW35qeY?= <****@****>,
>> =?UTF-8?b?U03jg4bjg4Pjgq8g44Kr44Oz44GV44KT?= <****@****>
>> From: =?UTF-8?b?6Jek5ZKyIOiLseWFiQ==?= <****@****>
>> Subject: =?UTF-8?B?Q0FE44OH44O844K/44CA77y1MjAwN+OAgOOBrumAgeS7mA==?=
>> Message-ID: <****@****>
>> Date: Thu, 20 Feb 2020 15:40:14 +0900
>> User-Agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64; rv:68.0)
>> Gecko/20100101 Thunderbird/68.5.0
>> MIME-Version: 1.0
>> X-Spam-WB: 128
>> X-SaMMA-Enc: YES
>> Content-Type: multipart/mixed;
>> boundary=------------59D26FDA1A592FEB6E55A290
>> Content-Language: en-US

================ Message Truncated ================

▷ 질문내용 :

메일 발송 중 5~6에 한번 꼴로 리턴 메일이 돌아온다고 합니다.

위가 보내온 메일 내용입니다.

현재 기본 smtp 포트는 25번으로

서브미션 포트 허용에 587 포트 이용중인 업체입니다.